Ricoh RS5C348A/B

modulename: rtc-rs5c348.ko

configname: CONFIG_RTC_DRV_RS5C348

Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>Ricoh RS5C348A/B
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
If you say yes here you get support for the
Ricoh RS5C348A and RS5C348B RTC chips.

This driver can also be built as a module. If so, the module
will be called rtc-rs5c348.

source code: